Boston bombing suspect Dzhokhar Tsarnaev is detained by officers on Friday, April 19. After a car chase and shootout with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, was shot and killed by police early Friday, and his brother and second suspect, Dzhokhar Tsarnaev, was taken into custody Friday night. The two men are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. See all photography related to the Boston bombings. from reddit Special imaging techniques employed by Massachusetts State Police reveal Boston Marathon bombing suspect Dzhokhar Tsarnaev hiding in a boat in a backyard in Watertown on April 19. Massachusetts State Police
Dzhokhar Tsarnaev gets out of the boat he was hiding in outside of a home in Watertown, as seen in a surveillance video still. CBS NEWS/AFP/Getty Images
An ambulance carries Boston Marathon bombing suspect Dzhokhar Tsarnaev, 19, from the scene after he was apprehended in Watertown, Massachusetts, on April 19. CJ GUNTHER/EPA /LANDOV
Police SWAT teams leave the area after apprehending the suspect in a yard where he was hiding in a dry-docked boat on April 19. EPA/CJ GUNTHER /LANDOV
Residents flee from an area where a suspect was hiding on Franklin Street on April 19. Darren McCollester/Getty Images
SWAT team members run toward a police assault on a house as gunfire erupts on April 19. REUTERS /JIM BOURG /LANDOV
People react while watching police respond to reported gunfire on April 19. Mario Tama/Getty Images
SWAT team members move down residential streets as they perform door-to-door searches in Watertown, Massachusetts, on April 19. CJ GUNTHER/EPA/LANDOV
A U.S. military helicopter lands behind Watertown Mall as law enforcement agencies continue to search for the 19-year-old bombing suspect on Friday. Mario Tama/Getty Images
SWAT teams prepare to enter a home as they continue the door-to-door search. Barry Chin/The Boston Globe/Getty Images
U.S. President Barack Obama meets with members of his national security team in the Situation Room of the White House on April 19 to discuss developments in the Boston bombings investigation. Pete Souza/The White House/Getty Images
SWAT team members line a residential street in Watertown, Massachusetts, as the manhunt continues on Friday. TIMOTHY A. CLARY/AFP/Getty Images
A man watches from the window of a home as a SWAT team member keeps watch on Friday, in Watertown, Massachusetts. Mario Tama/Getty Images
Police to continue to the door-to-door search on Francis Street in Watertown, Massachusetts, on Friday. Darren McCollester/Getty Images
Law enforcement officers place themselves in an overhead position on Arsenal Street as the search continues on April 19. Reuters /LUCAS JACKSON /LANDOV
Law enforcement officers react to what was initially thought to be a threatening suspect on Arsenal Street on April 19. Reuters /LUCAS JACKSON /LANDOV
A police SWAT team searches houses on April 19 for the second suspect. TIMOTHY A. CLARY/AFP/Getty Images
SWAT teams searches homes along Winsor Avenue in Watertown on April 19. Aram Boghosian/The Boston Globe/Getty Images
A Massachusetts state trooper watches other troopers line up at Watertown Mall as the manhunt for the second suspect continues in Watertown on Friday. STAN HONDA/AFP/Getty Images
Police continue the ongoing manhunt for the second suspect on Williow Avenue in Watertown on Friday. David L. Ryan/The Boston Globe/Getty Images
A Watertown police vehicle with bullet holes in its body and a shattered windshield is towed out of the search area on April 19 in Watertown, Massachusetts. LUCAS JACKSON/Reuters/LANDOV
A Massachusetts State Police officer checks the bag of a cyclist amid heightened security on Friday in Watertown. Mario Tama/Getty Images
Katia Costa looks out her window as police continue the manhunt on Nichols Avenue in Watertown on Friday. David L. Ryan/The Boston Globe/Getty Images
Ruslan Tsarni, uncle of the Boston terror suspects, told CNN affiliate WBZ that Tamerlan "got what he deserved" in an interview outside his home in Montgomery Village, Maryland, on Friday. JIM LO SCALZO/EPA/LANDOV A woman is questioned by Cambridge police and other law enforcement agencies Friday near the home of the second suspect in Cambridge, Massachusetts. A Massachusetts Institute of Technology campus police officer was shot and killed late Thursday night at the school's campus in Cambridge. A short time later, police reported exchanging gunfire with alleged carjackers in nearby Watertown. Jared Wickerham/Getty Images
SWAT teams move into position at the intersection of Nichols and Melendy avenues in Watertown, Massachusetts, on Friday. Aram Boghosian/The Boston Globe/Getty Images
SWAT teams gather at the intersection of Nichols and Melendy avenues in Watertown while searching for the remaining suspect on Friday. Aram Boghosian/The Boston Globe /Getty Images
Onlookers take pictures while SWAT team members look around on Friday. Mario Tama/Getty Images
Massachusetts Gov. Deval Patrick, left, speaks to the media at a shopping mall on the perimeter of a locked-down area during the search on Friday. STAN HONDA/AFP/Getty Images
Metro SWAT members hang off the back of a truck during the search on Friday. Darren McCollester/Getty Images
SWAT officers check a door with guns ready on Friday. MATT CAMPBELL/EPA/LANDOV
Officers patrol Watertown on Friday. Darren McCollester/Getty Images
The aftermath of the shootout that police said involved the two suspects in Watertown early Friday. Barcroft Media/Landov
Police with guns drawn search for a suspect on Friday in Watertown, Massachusetts. Mario Tama/Getty Images
A police officer runs with his gun drawn on Friday. Mario Tama/Getty Images
Boston Police gather in the parking lot in front of a Best Buy store near the Watertown Mall on Friday. Jared Wickerham/Getty Images
Boston Police Commissioner Edward Davis speaks during a media briefing in the parking lot of the Watertown Mall on Friday. Jared Wickerham/Getty Images
Boston police gather in front of a Best Buy on Friday. Jared Wickerham/Getty Images
Police stop cars at School and Walnut streets on Friday. Darren McCollester/Getty Images
A Massachusetts state trooper checks a building along Mount Auburn Street as police search neighborhoods in Watertown. MATT CAMPBELL/EPA/LANDOV
Police search neighborhoods yard by yard on Friday. MATT CAMPBELL/EPA/LANDOV
Police convene on School and Walnut streets on Friday. Darren McCollester/Getty Images
A police officer talks to a driver at a checkpoint in Watertown, Massachusetts.